tests/ui/async-await/issue-77993-2.rs - toolchain/rustc - Git at Google

 //@ edition:2018

 async fn test() -> Result<(), Box<dyn std::error::Error>> {
     macro!();
     //~^ ERROR expected identifier, found `!`
     Ok(())
 }

 fn main() {}
	//@ edition:2018

	async fn test() -> Result<(), Box<dyn std::error::Error>> {
	macro!();
	//~^ ERROR expected identifier, found `!`
	Ok(())
	}

	fn main() {}